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Finding the Fourth Proportional to 1,716.40, 2,381.59 and 1,647

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Solution

The fourth proportional to 1,716.40, 2,381.59 and 1,647 is: 2,285.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,716.40 : 2,381.59 = 1,647 : x
  2. Step 2: Convert to fraction form
    1,716.40/2,381.59 = 1,647/x
  3. Step 3: Cross multiply
    1,716.40x = 2,381.59 × 1,647
  4. Step 4: Simplify right side
    1,716.40x = 3,922,480.79
  5. Step 5: Solve for x
    x = 3,922,480.79/1,716.40
  6. Step 6: Final answer
    x = 2,285.29

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.